.box::before {
  content: "";
  display: block;
  width: 100px;
  height: 100px;
  background-color: rebeccapurple;
  border: 12px solid black;
  padding: 10px;
  background-color: aqua;
}

.box::before {
  content: "This should show before the other content. ";
}
.box::after {
  content: "This should show after the other content. ";
}
